Kudos to the author for trying, but this set falls into the same traps as every other attempt at producing a clean SMS cover set, which is glaring inconsistencies in color detail and disparities in brightness/contrast settings. In some cases, you can still see visible creases that were present in the source scans. I was ultimately unable to use these, and ended up having to produce my own curated set through hours of manual editing to level out all of the inaccuracies.
Here's to hoping somebody can finally provide a clean set. WallyWonka, anyone?